#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int main(int argc, char const *argv[])
{

    std::vector<int> numbers ={80 ,100 , 600 ,20 ,30};

    sort(numbers.begin(),numbers.end() , less<int>());

    for (vector<int>::iterator it = numbers.begin(); it !=numbers.end(); it++)
    {
        cout << *it << endl;
    }
    
    return 0;
}
